Physics
Which of the following terms is not used in the field of physics?

Refractive index
Stock value
Nuclear fusion
Latent heat

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Physics
Pressure Cooker cooks faster because

Boiling point decreases with rise of pressure
The material of the cooker is a good conductor
Higher temperature is attained for cooking
It cooks the food at low pressure

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Physics
The velocity of sound in air

Decreases with increase of temperature
Decreases with decrease of temperature
Does not depend on temperature
Increases with decrease of temperature

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